const mysql=require('mysql')

var con=mysql.createConnection({
    host:'192.168.187.144',
    port:3306,
    user:'root',
    password:'ddd',
    database:'mydatabase'
})

var userName=process.argv[2]
var age=process.argv[3]
var updateSql='update users set age=? where userName=?'

con.query(updateSql,[age,userName],(err,result)=>{
    if(err){
        console.log(err)
    }else{
        console.log(result)
    }
})